[Bug 226968] IRQ storm on cpu0 timer when holding down key on USB keyboard

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226968

--- Comment #19 from Hans Petter Selasky <hselasky at FreeBSD.org> ---
Hi Bruce,

The problem is that sc_delay is set to zero, but never setup again:

640                     ukbd_timeout(void *arg)
641                     {
642                             struct ukbd_softc *sc = arg;
643                     
644     avg     228765          UKBD_LOCK_ASSERT();
645     alfred  184610  
646     bde     304735          sc->sc_time_ms += sc->sc_delay;
647                             sc->sc_delay = 0;

--HPS

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